[R] coxph with cluster() model selection

From: Richard Chandler <rchandler_at_forwild.umass.edu>
Date: Thu 11 Aug 2005 - 05:33:23 EST


Hello,

Can someone suggest a strategy of selecting a parsimonious coxph model when there is a cluster() term, a frailty() term and several potentially important covariates? I have read in the R-help archives that AIC can not be used when cluster() is.

My full model looks something like:

fit <- coxph(Surv(start, stop, fate) ~ x1 + x2 + x3 + x4 + cluster(site) + frailty(year), data)

Thank you.

Richard

-- 
Richard Chandler
Department of Natural Resources Conservation
UMass Amherst
(413)545-1237

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Received on Thu Aug 11 05:39:53 2005

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